Non-binary phase gratings for x-ray imaging with a compact Talbot interferometer
Research output: Contribution to journal › Article
X-ray imaging using a Talbot-Lau interferometer, consisting of three binary gratings, is a well-established approach to acquire x-ray phase-contrast and dark-field images with a polychromatic source. However, challenges in the production of high aspect ratio gratings limit the construction of a compact setup for high x-ray energies. In this study we consider the use of phase gratings with triangular-shaped structures in an x-ray interferometer and show that such gratings can yield high visibilities for significantly shorter propagation distances than conventional gratings with binary structures. The findings are supported by simulation and experimental results for both cases of a monochromatic and a polychromatic source.
|Research areas and keywords||
Subject classification (UKÄ) – MANDATORY
|Number of pages||10|
|Publication status||Published - 2014 Jan 13|